Yeah, this happened to me.
In my case, the ventri was clogged from the varnishes in the gas.
Of course when you choke it and start up, you are basically
manually making the rich mix in the carb. So it starts fine
and dies in 2 seconds.
If you don't use gasoline stabilizer, DO. It prevents gum-up
in the venturi. I swear by this now after several weeks of
intermitent behavior and crazy starts.
I would add this to your gas can, and to the remaining gas in
your tank. Consider cleaning your carb if this is recurring.
The other thing about humidity could be a leaky electrical
connection.. Is the plug new?